In the span of 3 months only between January 2013 and end of March 2013 the US's infamous CIA transported more than 3,500 tonnes of weapons from the US military base in Qatar on the Persian Gulf through Turkey to terrorists in Syria including to Nusra Front terrorists, the US itself brand as terrorists.
Those thousands of tonnes of weapons are a tiny portion of the whole lot shipped from Libya, Ukraine, Saudi, UAE, and Turkey itself, and a from a host of other countries by the CIA into Syria. The arrangements to transfer one of these shipments cost the life of the US ambassador to Libya, and another whole ship called Lutfallah 2 is still held by the Lebanese authorities since it was confiscated in April 2012.
Not to mention transporting over 350,000 terrorists, yes you saw that figure right, an army larger than many armies in the region and 100,000 more than the active Syrian Army itself. The CIA with its partners brought these anti-Islamic Wahhabi suicide terrorists from all sides of the planet into Syria to topple the Syrian state.
Then some wonder why the Syrian crisis is lasting so long and why the high toll among the civilians and why the Syrian armed forces, the Syrian diplomat body and the Syrian people in general are strongly backing their president, and why the need for Russia and Iran to intervene?!
Imagine those terrorists took control of Syria, with a finance exceeding $138 billion until early 2017 as per the Qatari former prime minister on his own country's state TV, what could those terrorists do if they took control of Syria to Europe and everywhere else in the world had not the Syrians fought them and defeated them?